Vizio VL470M "No Power"

[gigabyte]

I have a No Power scenario on my Vizio VL470M HD TV. I believe it may have been caused by a storm we had. All my clocks at home were flashing due to a power outage. When I tried to turn on the Vizio nothing happens. No lights, no sound, no Vizio Logo.
I ordered another Power/Inverter board but it did not correct it. Now-with $80.00 already invested in the new Power board-should I just replace the Mainboard as well? Any help here would be greatly appreciated.

[Ltank]

Re: Vizio VL470M "No Power"

Have you measured any of the power supply voltages? Do you have 5vdc standby? Then check if there is a PS_on command from main board to P.S. this is your starting point

[budm]

Re: Vizio VL470M "No Power"

Post pictures of the back of the TV and the boards.

[gigabyte]

Re: Vizio VL470M "No Power"

Thank you for the help--I measured the 5V Stand By and all 3 terminals are measuring 5.12 v. The Power On/Off Pin is at 1.43 v. The 12 v pins are just above 12v.

[gigabyte]

Re: Vizio VL470M "No Power"

I attached the pictures in this message--let me know if you get them

[budm]

Re: Vizio VL470M "No Power"

OK, since the standby 5V is OK, you should check the SMD fuses on the main board next one of the fuse is for the 5V, another one is for the 12V.
http://www.shopjimmy.com/media/catal...4702320150.jpg

[gigabyte]

Re: Vizio VL470M "No Power"

Yes--I was looking at some of the videos like on YouTube--I checked the fuses and they are good-The Processor in the middle of the Main board is "HOT"-like temperature wise.

[Agent24]

Re: Vizio VL470M "No Power"

Yes--I was looking at some of the videos like on YouTube--I checked the fuses and they are good-The Processor in the middle of the Main board is "HOT"-like temperature wise.

Not necessarily a bad thing, they usually run hot - besides, if it was shorted, a fuse would likely be blown.

[uberdaan]

Re: Vizio VL470M "No Power"

Did you unplug and re-plug the set? I've been having a similar (?) problem in which I turn off the tv and it doesn't go into standby (orange light off). I can get the tv to turn back on if I just unplug and plug back in after a few seconds.